Performance Analysis of V-trough Solar Water Heater using Curve Shaped Riser Tubes

Channaveerayya Channaveerayya; Gowreesh  Subramanya; Nare Sreenivasalu Reddy

doi:10.37934/arfmts.123.2.4856

Authors

Channaveerayya Department of Mechanical Engineering, Government Polytechnic, Afzalpur-585301, Karnataka, India
Gowreesh Subramanya Department of Mechanical Engineering, JSS Academy of Technical Education, Bengaluru-560060, Visvesvaraya Technological University, Belgavi, Karnataka, India
Nare Sreenivasalu Reddy Department of Robotics and Automation, RajaRajeswari College of Engineering, Bengaluru-560074, Visvesvaraya Technological University, Belgavi, Karnataka, India

DOI:

https://doi.org/10.37934/arfmts.123.2.4856

Keywords:

Heat transfer, riser tubes, effectiveness, flat plate collector, Nusselt number

Abstract

An experimental study has been carried out in a V-trough solar water heating system (SWHS) equipped with curve shaped riser tubes (CSRT). By adding CSRT, the performance of the V-trough SWHS has improved. Experiments were carried out at different mass flow rates and different pitch values CSRT. Due to incorporation of reflector and shape of riser tubes leads to better efficiency and performance of the collector. In comparison to a plain tube CSRT offers better thermal performance. The results obtained indicate that curve shaped riser tubes have a larger frictional factor and Nusselt number than the plain riser tubes. As compared to the plain tube, the rise in Nusselt number is 41.04% and 49.43% at 100mm pitch, corresponding to a Reynolds number of 5500 and 14500 respectively.